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Only for training and service purposes
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5. Trouble shooting
GM310f service manual
Table 1
Test Point
Net name
Description
TP5
PA_LEVEL
Power Amp Gain Control. Typically, 0.2 ~1.6V
TP4
TXON_PA
Power Amp Enable (ON : >1.25V, OFF : <0.5V)
TP6
VBAT
PAM Supply Voltage (Vcc > 3V)
GSM PAM Circuit Diagram
GSM PAM Circuit Diagram
TP6
TP4
TP5
TP1
TP2
TP3
3
D
N
G
N
I
_
0
0
9
_
0
5
8
M
S
G
7
T
U
O
_
0
0
9
_
0
5
8
M
S
G
0
1
T
C
E
L
E
S
_
E
D
O
M
2
5
1
D
N
G
P
6
N
E
_
X
T
T
T
A
B
V
4
P
M
A
R
V
5
3
0
0
1
U
5
0
0
5
M
7
M
Q
T
3
S
B
1
P
A
C
_
Y
B
3
1
9
2
P
A
C
_
Y
B
N
I
_
S
C
P
_
S
C
D
1
T
U
O
_
S
C
P
_
S
C
D
2
1
1
D
N
G
4
1
1
1
2
D
N
G
8
u
1
0
.
0
0
6
0
1
C
u
1
0
.
0
1
6
0
1
C
p
6
1
5
0
1
C
2
6
0
1
C
p
7
4
T
A
B
V
K
0
1
4
1
0
1
R
4
4
0
1
C
u
3
3
p
3
.
3
6
5
0
1
C
0
5
0
1
C
p
7
2
H
n
9
3
5
5
0
1
C
8
5
0
1
C
H
n
2
2
H
n
8
.
6
4
5
0
1
C
9
5
0
1
C
p
2
1
2
5
0
1
C
I
N
D
B
L
_
T
U
O
A
P
_
M
S
G
B
H
_
T
U
O
A
P
_
M
S
G
S
B
_
G
2
A
P
_
N
O
X
T
E
D
O
M
_
A
P
L
E
V
E
L
_
A
P
H
n
8
.
1
1
0
0
1
C
T
N
A
1
G
2
G
1
0
0
1
W
S
1
0
-
E
1
0
0
-
9
7
2
0
2
3
0
0
1
C
p
5
7
.
0
I
N
D
1
1
0
1
C
H
n
8
1
1
0
0
1
L
p
2
2
2
0
0
1
C
0
0
0
3
E
-
2
2
H
-
S
2
-
2
0
3
S
R
G
2
0
0
1
W
S
T
N
A
1
G
2
G
F
R
TP6
TP4
TP5
TP1
TP2
TP3